Two electric lamps are rated as 220 V, 100 W and 220 V, 4 W respectively. Their electric resistances are
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Answer:
Given,
Ratings of 1st electric lamp:-
Voltage = 220V
Power = 100W
To find:-
Resistance of each bulb
Ampere = Watts/Vlots
= 100/220
= 0.45Amp
Now resistance = Voltage / Current
= 220/0.45
= 488.889ohm
Ratings of 2nd electric lamp:-
Ampere = Watts/Vlots
= 4/220
= 0.018182
Now resistance = Voltage / Current
= 220/0.018182
= 12099.998ohm.
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